Whoops, last release was floors, but the title was wrong :-|. Here we've got the separate walls for the dungeon stone ruined set, completing the basics. There's a ton of variation in here.
Beyond that, I went ahead and added infinitylock to the dungeon stone walls, and added in a 1x and 4x ruined wall to the wall on tile set as well. You can find all that in the dropbox.
Grab the files